Section 520.1422 - Metoserpate hydrochloride(a)Chemical name. Methyl-o-methyl-18-epireserpate hydrochloride.(b)Sponsor. See No. 054771 in § 510.600(c) of this chapter.(c)Related tolerances. See § 556.410 of this chapter.(d)Conditions of use. It is used in drinking water for replacement chickens as follows: (1)Amount. 568.5 milligrams per gallon (0.015 percent). (i)Indications for use. As a tranquilizer for flock treatment of chickens prior to handling.(ii)Limitations. To be used one time as a treatment for replacement chickens up to 16 weeks of age; usual drinking water should be withheld prior to treatment to provide adequate consumption of medicated drinking water; not for use in laying chickens; chickens slaughtered within 72 hours following treatment must not be used for food.(2)Amount. 2 to 4 milligrams per 2.2 pounds of body weight. (i)Indications for use. As an aid in control of hysteria.(ii)Limitations. To be used as a treatment for replacement chickens up to 16 weeks of age; usual drinking water should be withheld prior to treatment to provide adequate consumption of medicated drinking water; the drug should be administered at a dosage level of 4 milligrams per 2.2 pounds of body weight followed by 2 treatments at 4-day intervals of 2 milligrams per 2.2 pounds of body weight; not for use in laying chickens; chickens slaughtered within 72 hours following treatment must not be used for food.40 FR 13838, Mar. 27, 1975, as amended at 76 FR 17337 , Mar. 29, 2011; 78 FR 28824 , May 20, 2014